Precision Cooling For Business-Critical Continuity™ Liebert® CRV™ User Manual–60Hz, 24-Inch Wide, Air-Cooled, Water/Glycol-Cooled and Chilled Water
MODEL NUMBER NOMENCLATURE - 25 DIGIT CONFIGURATION NUMBER Model # Part 1 * 1 2 3 4 5 6 7 Model Details 8 9 10 11 12 13 C R 0 2 0 R A 1 C 7 S D 1 Digits 1-2 - Unit Family Liebert® CRV™ = CR Digits 3-5 - Nominal Capacity, kW DX = 020, 035 CW = 040 Digit 6 R = Row-Based, 1100mm unit depth Digit 7 - System Type A = Air Cooled W = Water\Glycol Cooled C = Chilled Water Cooled Digit 8 - Fan Type Variable Speed EC Plug Fans = 1 Digit 9 - Power Supply A = 460V / 3ph / 60Hz C = 208V / 3ph / 60Hz Digit 10
TABLE OF CONTENTS 1.0 2.0 LIEBERT CRV COMPONENT LOCATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7 2.1 Product Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 3.0 INSPECTION AND UNPACKING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
9.5 Remote Rack Sensor Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 9.5.1 9.5.2 9.5.3 9.5.4 9.5.5 9.5.6 10.0 DIP Switch Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 Set 2T Rack Sensor Identities—DIP Switch settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 Terminating the Last 2T Sensor on a Network . . . . . . . . . . . . . . . . . .
14.3 14.4 14.5 Maintenance Schedule . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108 Inspect and Replace the Air Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109 Condensate Drain and Condensate Pump Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111 14.5.1 Condensate drain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 20 Figure 21 Figure 22 Figure 23 Figure 24 Figure 25 Figure 26 Figure 27 Figure 28 Figure 29 Figure 30 Figure 31 Figure 32 Figure 33 Figure 34 Figure 35 Figure 36 Figure 37 Figure 38 Figure 39 Figure 40 Figure 41 Figure 42 Figure 43 Figure 44 Figure 45 Figure 46 Figure 47 Figure 48 Figure 49 Figure 50 Figure 51 Figure 52 Figure 53 Figure 54 Figure 55 Figure 56 Figure 57 Figure 58 Figure 59 Figure 60 Figure 61 Figure 62 Figure 63 Figure 64 Figure 65 Figure 66 Figure 67 Figure 68 Figure 69 Chilled wat
Figure 70 Figure 71 Figure 72 Figure 73 Figure 74 Figure 75 Figure 76 Figure 77 Figure 78 Figure 79 Figure 80 Figure 81 Figure 82 Figure 83 Figure 84 Figure 85 Figure 86 Figure 87 Figure 88 Figure 89 Figure 90 Figure 91 Figure 92 Figure 93 Figure 94 Figure 95 Figure 96 Figure 97 Figure 98 Figure 99 Figure 100 Figure 101 Figure 102 Figure 103 Figure 104 Figure 105 Figure 106 Figure 107 Diagnostics / service mode parameters screen - Page 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TABLES Table 1 Table 2 Table 3 Table 4 Table 5 Table 6 Table 7 Table 8 Table 9 Table 10 Table 11 Table 12 Table 13 Table 14 Table 15 Table 16 Table 17 Table 18 Table 19 Table 20 Table 21 Table 22 Table 23 Table 24 Table 25 Table 26 Table 27 Table 28 Table 29 Table 30 Table 31 Table 32 Table 33 Dry weight, all model types, ± 5% . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Center of gravity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Important Safety Instructions IMPORTANT SAFETY INSTRUCTIONS SAVE THESE INSTRUCTIONS This manual contains important safety instructions that should be followed during the installation and maintenance of the Liebert CRV. Read this manual thoroughly before attempting to carry out any operations on the Liebert CRV, including installation and operation. Retain this manual for the entire service life of the Liebert CRV.
Important Safety Instructions ! WARNING Arc flash and electric shock hazard. Can cause injury and death. Disconnect local and remote power supplies and wear appropriate personal protective equipment per NFPA 70E before working within. Before proceeding with installation, read all instructions, verify that all the parts are included and check the nameplate to be sure the voltage matches available utility power. The Liebert iCOM® microprocessor does not isolate power from the unit, even in the Unit Off mode.
Important Safety Instructions NOTICE Risk of water leakage. Can cause severe property damage and loss of critical data center equipment. This unit requires a water drain connection. It may require an external water supply to operate the humidifier. Improper installation, application and service practices can result in water leakage from the unit. Do not locate the Liebert CRV directly above any equipment that could sustain water damage.
Liebert CRV Component Location 1.
Liebert CRV Component Location Figure 3 Component location - Liebert CR035RW, CR020RW water/glycol-cooled units 1 1 Top water/glycol connections 2 Compressor 3 Brazed plate condenser 4 Bottom water/glycol connections 5 Water/glycol valve 6 Refrigerant receiver 7 Air filters 8 Vibasorber 9 Thermostatic expansion valve 10 Sight glass 11 Filter dryer 7 6 3 5 2 Figure 4 4 12 Humidity/temperature sensor 13 Bottom humidifier water supply Component location - Liebert CR040RC chil
Liebert CRV Component Location Figure 5 Overall dimensions / service area 25-9/16" (650mm) 35-9/16" (903mm) 13-3/4" (350mm) 25-9/16" (650mm) A B 78-3/4" (2000mm) Rear S 3-15/16" (100mm) Front Door Fully Open 12" (305mm) 107-5/16" (2725mm) 46-1/4" (1175mm) Top 21-5/8" (550mm) 23-5/8" (600mm) 46-1/4" 3" (1175mm) (75mm) S 3-15/16" (100mm) 23-5/8" (600mm) 27-9/16" (700mm) Air Filters Access Required to Remove / Install Entire Unit Within The Row Hot Air Rear l tal Ins 49" (1245mm) Cold Air
Introduction 2.0 INTRODUCTION 2.1 Product Description The Liebert CRV is a precision cooling unit available in compressorized (air-, water- or glycol-cooled) and chilled water configurations to be installed within a row of high-density computing racks in a “hot aisle-cold aisle” configuration. Air enters the rear of the Liebert CRV from the hot aisle, is filtered, cooled and conditioned, then discharged into the cold aisle.
Inspection and Unpacking 3.0 INSPECTION AND UNPACKING ! WARNING Risk of top-heavy unit falling over. Can cause equipment damage, personal injury and death. Read all of the following instructions before attempting to move, lift or remove packaging from the Liebert CRV. ! CAUTION Risk of sharp edges, splinters and exposed fasteners. Can cause personal injury.
Inspection and Unpacking • Always keep the packaged Liebert CRV upright and never leave it outdoors. • Be aware of the center of gravity indicated on the package and in Table 2 below: Table 2 Center of gravity Distance from lower right front corner, ± 2 in. (51m) Model no. X, in. (mm) Y, in. (mm) Z, in.
Inspection and Unpacking 3.3 Moving the Unit Using Rigging ! CAUTION Risk of sharp edges, splinters and exposed fasteners. Can cause personal injury. Only properly trained and qualified personnel wearing appropriate safety headgear, gloves, shoes and glasses should attempt to move, lift or remove packaging from the Liebert CRV or prepare the unit for installation. 1. Use a pallet jack or forklift to raise the packaged unit. 2.
Inspection and Unpacking Figure 10 Unpacking the Liebert CRV 197023 Rev. 4 3.5 Removing the Unit from the Skid ! WARNING Risk of top-heavy unit falling over. Can cause equipment damage, personal injury and death. Read all of the following instructions before attempting to move, lift or remove packaging from the Liebert CRV. ! CAUTION Risk of sharp edges, splinters and exposed fasteners. Can cause personal injury. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
Inspection and Unpacking Figure 11 Removing the unit from the skid Step 5 Step 8 Step 1 4 Bolts on Each Side Secure the Tie-Down Bracket to the Skid M17 Socket M13 Socket Step 8 Step 15 197023 Rev. 4 3.6 Reattach the Baffle Panel Once the Liebert CRV has been moved to where it will be installed, the baffle panel can be reattached. 1. Open top panel door (the one with the Liebert iCOM®). 2. Reattach the bottom baffle panel assembly with screws, using a T30 Torx drive. 3.
Prepare the Liebert CRV for Installation 4.0 PREPARE THE LIEBERT CRV FOR INSTALLATION 1. Open the display door and remove the lower front baffle panel using a 10mm nutdriver or T30 Torx Bit to prepare for installation. 2. Open the rear panel, referring to Figure 10. The documents are located inside the display door. 3. After the Liebert CRV is in its final installation position, adjust the four base supports, or feet, with an adjustable wrench.
Piping 5.0 PIPING All fluid and refrigeration connections to the unit, with the exception of the condensate drain, are sweat copper. Factory-installed piping brackets must not be removed. Field-installed piping must be installed in accordance with local codes and must be properly assembled, supported, isolated and insulated. Avoid piping runs through noise-sensitive areas, such as office walls and conference rooms.
Piping 5.1.1 Condensate Piping—Field-Installed • • • • • Do not reduce drain lines Do not expose drain line to freezing temperatures Drain line may contain boiling water.
Piping 5.1.3 Requirements of Systems Using Water or Glycol These guidelines apply to the field leak checking and fluid requirements for field piping systems, including Liebert chilled water, condenser (water or glycol) and drycooler circuits. General Guidelines • Equipment damage and personal injury can result from improper piping installation, leak checking, fluid chemistry and fluid maintenance. • Follow local piping codes, safety codes. • Qualified personnel must install and inspect system piping.
Piping Leak Checking of Unit and Field Piping Liebert unit fluid systems are factory-checked for leaks and may be shipped with a nitrogen holding charge. Liebert unit fluid circuits should be checked for leaks at installation as described below. NOTE During leak checking of field-installed piping, Emerson recommends that the unit be isolated using field-installed shutoff valves. When the Liebert units are included in a leak test, use of fluid for pressure testing is recommended.
Refrigerant Connections 6.0 REFRIGERANT CONNECTIONS ! WARNING Risk of explosive discharge from high-pressure refrigerant. Can cause injury or death. This unit contains fluids and/or gases under high pressure. Relieve pressure before working with piping. ! WARNING Risk of refrigerant system rupture or explosion from overpressurization. Can cause equipment damage, injury and death.
Refrigerant Connections 6.
Refrigerant Connections 6.2.1 General Layout 1. Piping must be Type ACR copper tubing and sized per Tables 7, 8, 9 and 10. NOTE All field-installed piping must comply with applicable national, state and local codes. 2. 3. 4. 5. Table 5 Use the shortest possible refrigeration pipelines to minimize the total charge of refrigerant and the number of pressure drops. Minimize the number of bends and make the bends the largest radius practical to prevent constricting refrigerant flow.
Refrigerant Connections Figure 16 Pipeline air conditioner - condenser C COND B (Distance) D = A + B + C CDT CDT = Conditioner COND = Condenser 6.2.2 A Pipe Diameter and Thickness ! WARNING Risk of explosive discharge. Can cause equipment damage, injury or death. Use only Type ACR copper tubing sized per Tables 7, 8, 9 and 10 for pipes connecting the Liebert CRV and the condensing unit.
Refrigerant Connections Table 9 Piping and refrigerant sizes for Liebert air-cooled, VFD control condensers with R-410A Condenser Piping Connection Sizes, Cu, O.D. Condenser Model # Entering Hot Gas Line, in. (mm) Returning Liquid Line, in. (mm) TCSV28K 1-1/8 (28.6) 7/8 (22.2) TCSV60K 1-1/8 (28.6) 7/8 (22.2) TCSV90K 1-1/8 (28.6) 7/8 (22.2) Source: DPN001624, Rev.
Refrigerant Connections 6.2.3 Installing Piping The following operations must be carried out by an experienced refrigeration technician. NOTICE 1. • • • 2. • 3. 4. 5. 6. 7. 8. Risk of oil contamination with water. Can cause equipment damage. The piping must not be open to the atmosphere for extended periods because the Liebert CRV requires POE (polyol ester) oil. POE oil absorbs water at a much faster rate when exposed to air than previously used oils.
Refrigerant Connections Figure 17 Connections—air-cooled models Unsolder when connecting through bottom Rear 1-1/8" (28mm) 23-5/8" (600mm) 17-5/16" (440mm) 3-1/4" (83mm) 9-1/2" (242mm) HS 46-1/4" (1175mm) CP RG 2-15/16" (74mm) 3-1/16" (77mm) 2-11/16" (69mm) 5" (127mm) 3-1/4" (83mm) RL GDH or HS 3-13/16" (97mm) 1-3/4" (45mm) HVT LVT LVT 2-1/8" (54mm) 3-1/16" (77mm) 5-1/8" (130mm) HVB 2-15/16" (74mm) GD or CP 1-1/2" (38mm) LVB 1-3/8" 7-13/16" (35mm) (199mm) 4-13/16" (122.
Refrigerant Connections Table 11 Unit connections, air-cooled models Unit Connections CR20A (50Hz) CR35A (50Hz) CR20A (60Hz) CR35A (60Hz) RL Refrigerant Liquid Line Inlet 12mm O.D. Cu Sweat 16mm O.D. Cu Sweat 1/2" O.D. Cu Sweat 5/8" O.D. Cu Sweat RG Refrigerant Gas Line Outlet 16mm O.D. Cu Sweat 22mm O.D. Cu Sweat 5/8" O.D. Cu Sweat 7/8" O.D. Cu Sweat GD Gravity Coil Pan Drain 20mm I.D. 1" MPT 22mm I.D.
Refrigerant Connections 6.3 Vacuum and Refrigerant Charge NOTICE Risk of improper refrigerant charge. Can cause equipment damage and reduced efficiency. Check the refrigerant type to be used on the data plate of the air conditioner and on the refrigerating compressor. Table 12 R-410A refrigerant and oil charge for air-cooled models Base Oil Charge 1 Base Refrigerant Charge 1 lb (kg) Model Initial Oil Charge oz (kg) Max. Topping Up oz (kg) Max.
Refrigerant Connections Figure 18 Connections for vacuum creation and refrigerant charge Suction and Supply Line Connections Thermostatic Valve Connection Liquid Line Connection 6.3.1 Evacuation Air-Cooled Models Variable Fan Speed Control Leak Check and Evacuation Procedure Proper leak check and evacuation can be accomplished only with all system solenoid valves open and check valves accounted for.
Refrigerant Connections Variable Fan Speed Charging 1. Check unit nameplate for refrigerant type to be used. Unit control configurations differ depending on refrigerant type. 2. Charging the system with refrigerant requires the unit to be in an operational state.. 3. Calculate the amount of charge for the system. Refer to the unit, condenser and refrigerant line charge data in Tables 12, 13 and 14. 4. Weigh in as much of the system charge as possible before starting the unit.
Water Connections 7.0 WATER CONNECTIONS Table 16 Water connection options Liebert CRV Option Top Connections Bottom Connections Condensate Pump and Humidifier Available Available Condensate Pump and No Humidifier Available Available Not Available Available No Condensate Pump and No Humidifier Table 17 Model 7.1 Volume of CRV internal water circuits Volume CR020RW 4.8 liters, 1.27 gallons CR035RW 5.7 liters, 1.51 gallons CR040RC 17.6 liters, 4.
Water Connections 7.2 Glycol Mixture Add ethylene glycol or propylene glycol to the circuit in the percentages shown in Table 18. Table 18 Glycol Percentage * by Volume Ethylene Glycol Freezing Temperature, °F (°C) Propylene Glycol Freezing Temperature, °F (°C) 0% 32 (0) 32 (0) 10% 25.3 (-3.7) 28.9 (-1.7) 20% 16 (-8.9) 18.7 (-7.4) 30% 3.7 (-15.7) 8.4 (-13.1) 40% -12.6 (-24.8) -6.7 (-21.5) * 7.
Water Connections 7.4 Chilled Water Connections: Chilled Water Units Figure 20 Chilled water connections Top Connections Bottom Rear Connections Refer to Figure 21 when performing these installation steps: • Use copper tubing or steel pipe. • Place the tubing on supporting saddles. • Insulate both tubes • Install shutoff ball valves on the inlet and outlet pipes to ease maintenance. • Install optional thermostats and pressure gauges on the inlet and outlet pipes.
Water Connections Figure 22 Air bleeding valve position CW REAR VIEW Liebert® CRV™ 32
Water Connections Figure 23 Connections—water/glycol models 6-1/8" (155mm) Piping and electrical connections available at the top and bottom of unit.
Water Connections Table 19 Unit connections, water/glycol-cooled models Unit Connections CS CR20W (50Hz) CR35W (50Hz) CR20W (60Hz) CR35W (60Hz) Water/Glycol Coolant Supply 32mm GAS F 1-1/4" FPT CR Water/Glycol Coolant Return 32mm GAS F 1-1/4" FPT GD Gravity Coil Pan Drain 20mm I.D. 1" MPT 22mm I.D.
Water Connections Figure 24 Connections—chilled water models Piping and electrical connections available at the top and bottom of the unit. 4-1/8" (105) 6-1/8" (155) REAR 9-3/4" (248) TOP CONNECTIONS 3-1/4" (83) 9-1/2" (242) 17-5/16" (440) HS CWR CP CWS 2-11/16" (69) 5" (127) 2-3/16" (56) 3-1/4" (83) HVT LVT 2-11/16" (69) LVT 1-1/2" (38.1) 4-13/16" (122.
Water Connections Table 20 Unit connections, chilled water models Unit Connections CR040C (50 Hz) CR040C (60 Hz) Chilled Water Supply 32mm GAS F 1-1/4" FPT CWR Chilled Water Return 32mm GAS F 1-1/4" FPT GD Gravity Coil Pan Drain 20mm I.D. 1" MPT GDH Gravity Humidifier Drain 22mm I.D.
Electrical Connections 8.0 ELECTRICAL CONNECTIONS 8.1 Electrical connections ! WARNING Arc flash and electric shock hazard. Can cause injury and death. Disconnect local and remote power supplies and wear appropriate personal protective equipment per NFPA 70E before working within. Before proceeding with installation, read all instructions, verify that all the parts are included and check the nameplate to be sure the voltage matches available utility power.
Electrical Connections Figure 27 Power and control cable entry points and routing High Voltage Top Entry Port High Voltage Top Entry Port Low Voltage Top Entry Port Low Voltage Channel opening provides access to the Liebert IntelliSlot® card housing Low voltage cables are routed through a channel in the side panel to connect the bottom of the unit to the electrical panel High voltage bottom entry port Low voltage bottom entry port Before proceeding with the electrical connections, ensure that: • all
Electrical Connections 8.2 Protective Features of the Electrically Commutated Fans The EC fans are protected against: • • • • Overtemperature of electronics Overtemperature of motor Locked rotor protection Short circuit at the motor output When any of these failures occurs, the motor stops, electronically, with no potential for separation, and the status relay is released. The unit does not restart automatic automatically.
Startup 9.0 STARTUP 9.1 Initial Startup ! WARNING Risk of hair, clothing and jewelry entanglement with high speed rotating fan blades. Can cause equipment damage, serious injury or death. Keep hair, jewelry and loose clothing secured and away from rotating fan blades during unit operation. ! WARNING Risk of contact with rotating fan blades. Can cause injury or death. The Liebert CRV’s fan blades will continue spinning after the unit is shut Off.
Startup Checks to Perform after Startup Once the system is operating under load, check the various components, as follows: 1. Verify that the fans are operating properly. 2. Ensure that the temperature and relative humidity are being controlled, and that the humidifier (optional) and heating steps (optional) operate when required. 3. Ensure that the compressor operates when required. 4.
Startup 9.3 Chilled Water Valve: Chilled Water Models The 3-way valve controls the chilled water flow and operates as follows (refer to Figure 4): • When the valve is fully open (i.e., maximum chilled water flow), the actuator slot is set to “1.” • When the valve is closed (i.e., no chilled water flow), the actuator slot is set to “0.” The valve running time is set to the value specified in the control manual. For more details, see the technical bulletin for chilled water valves and related actuators.
Startup To adjust the baffles: 1. 2. 3. 4. Open the door containing the Liebert iCOM® display. Remove the two screws holding a baffle panel segment in place. Slide out the baffle segment. There is one screw on each side of the baffle, as shown in Figure 31. Remove the screws and rotate the baffle segment around its horizontal axis to change the airflow direction. 5. Reinsert the baffle segment and reinstall the screws.
Startup Figure 32 Adjust air-blocking plate Perforated Supply Air Opening Air Blocker Installed Over Perforation Attachment Screws FRONT VIEW INSIDE DISPLAY DOOR DPN001863 Pg. 2, Rev. 2 Instructions to adjust the air blocker: 1. Remove the three screws that attach the blocker plate to the display door. 2. Reattach the blocker plate to the other side of the display door or remove entirely. 9.
Startup Figure 33 Figure 2T rack sensor ( 4- 7/1 41 (1-5/8") 67 (2-5/8") 11 2 4.5 (3/16") Back 6") 86 (3-3/8") 2T Sensor Front View Max. depth 41 (1-5/8") Source DPN001983 rev0 9.5.1 Each temperature probe wire is 1830mm (6 feet) long Temperature sensing probe DIP Switch Settings Three 2T sensor housings are included with each Liebert CRV. The DIP switches in these sensors have been preset at the factory.
Startup 9.5.2 Set 2T Rack Sensor Identities—DIP Switch settings 1. Confirm the DIP switches are set correctly for 2T sensors numbered 1, 2 and 3. 2. If additional sensors are to be connected to a cooling unit: a. Apply numbered stickers to the sensor housings, corresponding to sensor chain position. b. Based on the sensor number, use the included DIP switch tool to set the DIP switches according to the table above.
Startup Figure 36 Termination jumper setting Circuit board inside display housing Circuit board inside 2T sensor housing Termination Jumper in the Terminated Position 3 2 1 3 1 Terminated Unterminated 9.5.4 2 Route the CAN bus wire into the cooling unit The CAN bus sensors connect to the open CAN port on the back of the unit display panel. The Display comes “Terminated” from the factory and will have to be “Un-terminated’ to allow for additional sensors to be added.
Startup 9.5.5 Installing 2T sensors on racks Both temperature sensors attached to a 2T sensor housing are to be installed on 1 rack. The sensor can be attached to the inside or outside of the rack's front door. • One temperature sensor is to be attached near the top of the rack’s front door by using a cable tie to secure the wire to the perforation (approx. 12" [305mm] from the top). Do not wrap a cable tie around the actual sensor on the end of the wire.
Startup Located in the Service / Rack Setup Menu of the Liebert iCOM® display, the sensors can be set up to either display or control temperature, give them a rack name and draw a rack layout that can be viewed in the User menu. 9.5.6 Remote Rack Sensor Operation and Rack View Setup Figure 38 Rack setup screen, page 1 of 3 Rack Setup (page 1 of 3) S901 PASSWORD (act.
Startup Figure 40 Rack setup screen, page 3 of 3 Rack Setup (page 3 of 3) Liebert CRV No Sensors No rack Sensor Note 01 00 DC01 = = = = 02 UNIT 01 CRV NoS [blank] 01-10 00 DC03 03 Assign Names: 01-06 07-12 13-18 19-22 00 DC05 04 00 DC07 05 00 DC09 06 DC11 Cold Aisle DD04 CRV DD02 00 07 00 08 CRV 00 00 00 00 00 00 Use the navigation keys to move from rack to rack, Enter to select a rack, and up- or down keys to scroll through options.
Liebert iCOM® Control 10.0 LIEBERT ICOM® CONTROL The Liebert CRV is equipped with the most advanced Liebert iCOM control system. The large Liebert iCOM display is standard on the Liebert CRV. Each Liebert CRV contains a return air temperature and humidity sensor, supply air temperature sensor and three remote rack sensors. Up to an additional 7 remote rack sensors can be added to the sensor network.
Liebert iCOM® Control Figure 42 Liebert iCOM® default screen symbols 10.1 fan cooling hot water electric heat freecooling dehumidification maintenance humidification Navigating Through the Liebert iCOM Menus Liebert iCOM shows icons and text for monitoring and controlling your Liebert cooling units or network of cooling units. The number of icons and amount of text shown depends on the display size. 10.1.
Liebert iCOM® Control change the unit being viewed. Pressing the ESC key will go back a level. Figures 44 and 45 show the Liebert iCOM® control menus for a stand-alone large display and for a networked large display, respectively. NOTE Settings are readable without a password, but changing settings requires a password. 10.1.3 Entering a Password To change the value of a parameter in a menu, you must first enter the password for that menu.
Liebert iCOM® Control Figure 44 Menu tree—Large display, stand-alone Unit 1 will be displayed in the top left corner of the screen.
Liebert iCOM® Control 10.1.4 Viewing Multiple Units with a Networked Large Display When you first wake up the control, press the ESC key to return to the System view Status menu. This view shows an average of all the units on the network and any alarms present. To view a specific unit on the network, press either the enter key or down arrow key. When you do this, you will see the word System in the top left of the screen change to a unit number.
Liebert iCOM® Control Figure 46 User menu icons °C / °F % RH SET ! ACTIVE ALARMS Table 23 SET ALARMS EVENT LOG 9 SET 12 6 3 RACK VIEW 1234 h User Menu password: 1490 User menu icons Icon Name °C / °F % RH SET EVENT LOG SET ALARMS ! Description Setpoints View and change temperature and humidity setpoints Spare Part List Displays the various part numbers of the components/parts in the cooling unit Event Log Contains last 400 events Graphics Displays temperature and humidity graphs
Liebert iCOM® Control Table 23 User menu icons (continued) Icon Name RACK VIEW DO Description Rack View Allows viewing data, collected by sensors, about rack status Service Contact Info Contains key contact information for local service, including names and phone numbers iCOM-DO Change settings for Liebert iCOM® Discrete Output card Figure 47 Service menu icons + °C / °F % RH SET WELLNESS NETWORK +/Table 24 SERVICE SET UP SET ALARMS Service Menu password: 5010 RACK SETUP Service menu
Liebert iCOM® Control Table 24 Icon +/- Service menu icons (continued) Name Description Sensor Calibration/Setup Allows calibration of sensors System/Network Setup Allows setup and U2U communication for multiple units Options Setup Allows setup of component operation Rack Setup Label racks, establish settings for sensors Service Contact Info Contains key contact information for local service, including names and phone numbers Humidifier Settings Change Humidifier settings NETWORK Liebert®
Liebert iCOM® Control 10.2 Liebert iCOM® Display Readout The Liebert iCOM controller for the Liebert CRV supports multiple main screen layouts. The screens are a graphical representation of the Liebert CRV, selectable to show unit operation with or without rack sensors, unit operation with a rack sensor summary, historical temperature and humidity trending or trending the screens used on other Liebert products.
Liebert iCOM® Control Figure 49 Liebert iCOM® menu components for Liebert CRV Return Temperature and Humidity UNIT 1 Liebert Rack Inlet Temp Average : 71°F Maximum: 73°F Minimum: 69°F 98°F 20%RH CRV 69 51 °F Supply Temperature and Humidity Last Two Events, Warnings or Alarms Fan Speed 89% %RH 67% Cooling Capacity 04/2011 Next recommended maintenance 28.02.2011 15:03 UNIT ON 28.02.2011 14:07 (01) UNIT ON 28.02.
Liebert iCOM® Control 10.3 Liebert iCOM® Control Setup The Liebert iCOM on the Liebert CRV leaves the factory with the fan speed and cooling capacity controlled by the supply air sensor. This control mode is extremely robust and will ensure that you are delivering precise cooling to the cold aisle. To unlock the full capability of the Liebert CRV, the remote rack sensors should be installed, which will allow the fan speed and the cooling capacity to be “de-coupled.
Liebert iCOM® Control The supply temperature Setpoint may require adjusting since it will be dependent on the distance of the CRV to the server racks being cooled. This temperature will also be dependant on rack blanking panels, server population and if containment is being used.
Liebert iCOM® Control Calculating Unit Wellness Liebert iCOM® keeps tabs on the condition of a cooling unit, determining its wellness and projecting when service will be needed, for the entire unit as well as for individual components. This assists in scheduling maintenance calls and helps pinpoint components likely to require service. Liebert iCOM displays a graphic for needed maintenance.
Liebert iCOM® Control 10.7 Liebert CRV Operation—Liebert iCOM® Control 10.7.1 Cooling The cooling control of the Liebert CRV can be managed from any of the temperature sensors. Emerson recommends using the supply temperature sensor to control the cooling capacity of the Liebert CRV. The supply temperature is an accurate representation of the actual heat rejection the Liebert CRV needs to perform at an optimal level.
Liebert iCOM® Control 10.8 Liebert iCOM® User Menu Screens User menus report general cooling unit operations and status. The user menu password is 1490. The User menu parameter tables in this manual may differ from the display on your cooling unit. The Liebert iCOM functions with several Liebert Precision Cooling units, each with its own set of control commands. In addition, the Liebert iCOM control firmware is being updated constantly.
Liebert iCOM® Control View Network View Network—The view network screen provides an overview of the Liebert iCOM® network and a status of each unit. This screen will provide the unique unit name given to the unit. If no name is given, then only the unit number will be displayed.
Liebert iCOM® Control Figure 54 Display setup parameters screen DISPLAY SETUP S401 S402 S403 S404 S405 S406 S407 S408 S409 S410 S411 SYSTEM Language Date Time Temperature Indication Display Contrast Buzzer Frequency Backlite Off after Screen ENGLISH (US) 7/17/2010 09:20:19 °F 50 Off/ 0 30 min Rack View Display Colors Date Format Normal mm/dd/yyyy for next/previous unit to select parameter to confirm then to change parameter Language—This parameter sets the language on the display.
Liebert iCOM® Control Figure 55 Total run hours parameters screen TOTAL RUN HOURS U501 U502 U503 U504 U505 U506 U507 U508 U509 U510 U511 UNIT 01 Actual Hours 3513 3511 Limit 0 0 Chilled Water 0 0 Electric Heater 0 0 160 5 0 0 Fan Motor (s) Compressor 1 Humidifier Dehumidification for next/previous unit then to select parameter to confirm to change parameter Each parameter shows the actual hours the component has operated and the maximum time the component can operate before the next maint
Liebert iCOM® Control Figure 57 Setpoints parameters screen - Page 1 SETPOINTS (page 1 of 4) S101 S102 S103 S104 S105 S106 S107 S108 S109 S110 S111 UNIT 01 PASSWORD (Actual Level 0) Temperature Setpoint Temperature Control Sensor Temperature Control Type Temperature Deadband Cooling Proportional Band Cooling Integration /Derivative Heating Proportional Band Heating Integration /Derivative CRV Control for next/previous unit then ???? 68 °F Remote Sensor Proportional 2°F 9°F min/ sec 9°F min/ sec Averag
Liebert iCOM® Control Figure 58 Setpoints parameters screen - Page 2 SETPOINTS (page 2 of 4) S112 S113 S114 S115 S116 S117 S118 S119 S120 S121 S122 UNIT 01 PASSWORD (Actual Level 0) Humidity Setpoint Humidity Control Type Humidity DeadBand Humidity Proportional Band Humidity Integration Time Dehum Proportional Band Dehum Integration Time Dehum/Heat Low Limit 1 Low Limit 1 reset for next/previous unit then ???? 45% PI 5% 5% 0min 5% 0min -9°F 0°F to select parameter to confirm to change parameter Humi
Liebert iCOM® Control Figure 59 Setpoints parameters screen - Page 3 SETPOINTS (page 3 of 4) S123 S124 S125 S126 S127 S128 S129 S130 S131 S132 S133 UNIT 01 PASSWORD (Actual Level 0) Fan Control Type Fan Control Sensor Fan Regulation Type Fan Delta Fan Speed Proportional Band Fan Speed Integration Fan Speed Manual Setpoint Fan Speed STD Fan Speed Min Fan Speed Dehum for next/previous unit then ???? Auto Remote Sensor °F °F min % 75% 50% 70% to select parameter to confirm to change parameter Fan Contr
Liebert iCOM® Control Figure 60 Setpoints parameters screen - Page 4 SETPOINTS (page 4 of 4) S134 S135 S136 S137 S138 S139 S140 S141 S142 S143 S144 UNIT 01 PASSWORD (Actual Level 0) MIN at CFC for EC Fan STD at CFC for EC Fan High Temp Limit Approach High Temp Limit Approach at ???? 0% 100 % Supply 2°F Ball Valve Setpoint Offset 0psig for next/previous unit then to select parameter to confirm to change parameter MIN at CFC for EC Fan—This parameter can provide an offset to the minimum fan speed a
Liebert iCOM® Control Figure 61 Standby settings / lead-lag parameters screen STANDBY SETTINGS/LEAD-LAG S501 S502 S503 S504 S505 S506 S507 S508 S509 S510 S511 SYSTEM PASSWORD (Actual Level 0) Number of Standby Units Rotation Frequency Rotate at (hour ) Rotate at (minute) Rotate by Perform one Rotation Cascade Units Start all Standby Units by HT for next/previous unit then ???? 0 to select parameter to confirm to change parameter Number of Standby Units—This parameter selects the number of units tha
Liebert iCOM® Control Figure 62 Wellness basic settings screen- Page 1 WELLNESS basic settings (page 1 of 5) S001 S002 S003 S004 S005 S006 S007 S008 S009 S010 S011 PASSWORD (Actual Level 0) Maintenance Frequency Per Year Max Bonus Max Penalty Last Maintenance Service Engineer Confirm PM Calculated Next Maintenance for next/previous unit then SYSTEM ???? 1 0 0 06/14/2010 Nobody No 06/2011 to select parameter to confirm to change parameter Maintenance Frequency Per Year—This parameter sets the number
Liebert iCOM® Control Figure 63 Wellness motor settings parameters screen - Page 2 WELLNESS motor settings (page 2 of 5) S012 S013 S014 S015 S016 S017 S018 S019 S020 S021 S022 PASSWORD (Actual Level 0) Number of Starts Run Hours Average Run Time Starts per Day Best Starts per Day Worst Number of Alarms Actual Bonus for next/previous unit then UNIT 1 ???? 21 3376 hrs 9645 min 1 24 0 0 to select parameter to confirm to change parameter Number of Starts—This parameter shows the number of starts for t
Liebert iCOM® Control Figure 64 Wellness compressor 1 settings parameters screen - Page 3 WELLNESS compressor1 settings (page 3 of 5) S023 S024 S025 S026 S027 S028 S029 S030 S031 S032 S033 PASSWORD (Actual Level 0) Number of Starts Run Hours Average Run Time Starts per Day Best Starts per Day Worst Number of HP Alarms Number of LP Alarms Number of OL Alarms Number of DS HT Alarms Actual Bonus for next/previous unit then UNIT 1 ???? 22 3374 hrs 9201 min 12 240 0 0 0 0 0 to select parameter to confirm
Liebert iCOM® Control Figure 65 Wellness electric heater 1 settings parameters screen - Page 4 WELLNESS el heater 1 settings (page 4 of 5) UNIT 1 S034 S035 S036 S037 S038 S039 S040 S041 S042 S043 S044 ???? 0 0hrs 0min 24 240 0 0 PASSWORD (Actual Level 0) Number of Starts Run Hours Average Run Time Starts per Day Best Starts per Day Worst Number of HP Alarms Actual Bonus for next/previous unit then Screen displayed only if unit is equipped with electric heater to select parameter to confirm to chang
Liebert iCOM® Control Figure 66 Wellness humidifier settings parameters screen - Page 5 WELLNESS humidifier settings (page 5 of 5) S045 S046 S047 S048 S049 S050 S051 S052 S053 S054 S055 PASSWORD (Actual Level 0) Number of Starts Run Hours Average Run Time Starts per Day Best Starts per Day Worst Number of Alarms Actual Bonus for next/previous unit then UNIT 1 ???? 14404 154 hrs 0min 24 240 0 0 Screen displayed only if unit is equipped with humidifier to select parameter to confirm to change paramet
Liebert iCOM® Control Figure 67 Diagnostics / service mode parameters screen - Page 1 DIAGNOSTICS/SERVICE MODE (page 1 of 6) S301 S302 S303 S304 S305 S306 S307 S308 S309 S310 S311 PASSWORD Actual Level0) HP 1 Alarm Code LP 1 Alarm Counter HT1 Alarm Counter 12h Dehum Counter UNIT 01 ???? 0 0 0 0 Low Supply Temperature Counter Actual LP1 Pressure 0 169psig Actual HP1 Pressure 338psig for next/previous unit then to select parameter to confirm to change parameter HP 1 Alarm Code—Compressor 1 high
Liebert iCOM® Control Figure 68 Diagnostics / service mode parameters screen - Page 2 DIAGNOSTICS/SERVICE MODE (page 2 of 6) S312 S313 S314 S315 S316 S317 S318 S319 S320 S321 S322 UNIT 01 PASSWORD Actual Level0) Manual Mode Motor(s) Compressor 1 Compressor 1 Capacity Compressor 1 Cycle Ramp Compressor 1 LLSV ???? No On Run On On 76% On for next/previous unit then to select parameter to confirm to change parameter Manual Mode—Use this setting to place the Liebert iCOM® control in manual mode.
Liebert iCOM® Control Humidifier Fill—This activates just the humidifier water source solenoid valve which fills the humidifier pan or canister with water. Humidifier—This activates the humidifier system in its entirety. Humidifier Drain—This activates just the humidifier drain solenoid in the case of the steam generating humidifier, allowing water to drain from the canister.
Liebert iCOM® Control Figure 71 Diagnostics / service mode parameters screen - Page 5 DIAGNOSTICS/SERVICE MODE (page 5 of 6) S345 S346 S347 S348 S349 S350 S351 S352 S353 S354 S355 PASSWORD Actual Level0) Status Remote Shutdown Status Airflow 1 Status Airflow 2 Status Filter Status Customer Input 1 Status Customer Input 2 Status Customer Input 3 Status Customer Input 4 Status LSI Status Heaters Safety for next/previous unit then UNIT 01 o-o o-o o-o o-o o/o o/o o/o o/o o-o o/o ???? On OK OK OK OK OK OK
Liebert iCOM® Control Figure 73 Set alarms parameters screen - Page 1 SET ALARMS (page 1 of 4) S201 S202 S203 S204 S205 S206 S207 S208 S209 S210 S211 PASSWORD UNIT 01 (Actual Level 0) Tem/Hum Events High Supply Temperature Low Supply Temperature High Return Temperature High Return Humidity Low Return Humidity High CW Temperature Enabled 80 °F 46 °F 104 °F 60 % 15 % °F for next/previous unit then ???? to select parameter to confirm to change parameter Temp/Hum Events—This parameter enables or dis
Liebert iCOM® Control Figure 74 Set alarms parameters screen - Page 2 SET ALARMS (page 2 of 4) S211 S212 S213 S214 S215 S216 S217 S218 S219 S220 S221 PASSWORD Customer Input Customer Input Customer Input Customer Input Customer Input Customer Input Customer Input Customer Input UNIT 01 (Actual Level 0) 1 1 active when 2 2 active when 3 3 active when 4 4 active when ???? Smoke Alarm Closed Fire Alarm Closed C PMP Alarm SD Closed HUM Closed for next/previous unit then to select parameter to confirm t
Liebert iCOM® Control Figure 76 Set alarms parameters screen - Page 4 SET ALARMS (page 4 of 4) S234 S235 S236 S237 S238 S239 S240 S241 S242 S243 S244 S245 S246 UNIT 01 PASSWORD (Actual Level 0) DELAY CALL SERVICE 5 HIGH TEMPERATURE 5 ???? EN-DIS TYPE ENABLE ALM ENABLE ALM HEAT REJ VFD HEAT REJ TVSS 0 0 ENABLE ENABLE CONDENSER 1 FAILURE CUSTOMER INPUT 2 CUSTOMER INPUT 3 CUSTOMER INPUT 4 0 5 5 5 ENABLE WRN ENABLE ALM ENABLE ALM ENABLE ALM ALM ALM This screen selects the operation of an active al
Liebert iCOM® Control Figure 77 Sensor calibration / setup parameters - Page 1 SENSOR CALIBRATION/SETUP (page 1 of 4) S601 S602 S603 S604 S605 U606 S607 S608 S609 S610 S611 PASSWORD Actual Level0) Return Temperature Calibrated Return Temperature Return Humidity Calibrated Return Humidity Digiscroll 1 NTC Calibrated Digiscroll 1 NTC for next/previous unit then UNIT 01 ???? +0°F 77°F +0.0% 26.
Liebert iCOM® Control Return T Sensor PTC or NTC—This parameter selects the type of sensor being used for the return air sensor. Return T Sensor—This parameter can provide an offset to the actual sensor reading to calibrate the units sensor to other sensors. Calibrated Return T Sensor—This parameter is the reading after the offset has been added to or subtracted from the actual sensor reading. Supply T Sensor PTC or NTC—This parameter sets the type of sensor that is connected to the unit.
Liebert iCOM® Control Figure 80 Sensor calibration / setup parameters - Page 4 SENSOR CALIBRATION/SETUP (page 4 of 4) S634 S635 S636 S637 S638 S639 S640 S641 S642 S643 S644 PASSWORD Actual Rack Temperature Sensor Rack Temperature Sensor Rack Temperature Sensor Rack Temperature Sensor Rack Temperature Sensor Rack Temperature Sensor Rack Temperature Sensor Rack Temperature Sensor Rack Temperature Sensor Rack Temperature Sensor Level0) 1B 2B 3B 4B 5B 6B 7B 8B 9B 10B for next/previous unit then UNIT 01 °
Liebert iCOM® Control Network Safe—This parameter saves or loads network settings for the display that have been modified from the factory defaults to an internal file that can be downloaded / uploaded using the Liebert iCOM® Service Tool. Selecting “Save” will write the settings to the internal storage file and selecting “Load” will write the settings from the internal storage file to the application software.
Liebert iCOM® Control Figure 83 System/Network setup parameters Unit- Page 1 SYSTEM / NETWORK SETUP (page 1 of 2) S823 S824 S825 S826 S827 S828 S829 S830 S831 S832 S833 PASSWORD (Actual Level 0) Monitoring Address Monitoring Timeout /Handshake Unit Name No/ ???? 3 0 UNIT Configuration Safe Network Safe SW Version Changed No OK No CRM 2.00.006 .
Liebert iCOM® Control Figure 84 System/Network setup parameters Unit - Page 2 SYSTEM / NETWORK SETUP (page 2 of 2) S834 S835 S836 S837 S838 S839 S840 S841 S842 S843 S844 PASSWORD (Actual Level 0) Monitoring Protocol IP Address Netmask Gateway MAC U2U Protocol U2U Address U2U Group Bootloader Variables Static RAM UNIT 01 ???? Velocity V4 10.203.062.178 255.255.255.192 10.203.062.
Liebert iCOM® Control Figure 85 Rack Overview, Page 1 Rack Overview (page 1 of 1) UNIT 01 1 CC21 2 3 4 BB01 BB02 BB03 77 78 78 77 Cold Aisle 78 EC50 EC51 5 6 All temperatures shown in °F This screen shows the rack label assigned to each rack and the temperature associated with the rack sensor. This screen shows the relative distance between the Liebert CRV and each rack sensor.
Liebert iCOM® Control Figure 87 Rack Setup, Page 2 RACK SETUP (page 2 of 3) Liebert CRV No Sensors No Rack Sensor Node 1 0 = = = = UNIT 01 Assign Sensors: 01-06 07-12 13-18 19-22 CRV -2 0 01-10 0 0 0 0 0 2 3 4 0 0 0 0 0 0 CC21 Cold Aisle 0 5 6 0 0 0 Use the navigation keys to move from rack to rack . Enter to select a rack, and up - or down keys to scroll through options . The Rack Setup display allows creating a graphical map of the remote rack sensors.
Liebert iCOM® Control Figure 89 Options setup parameters - Page 1 OPTIONS SETUP (page 1 of 2) S401 S402 S403 S404 S405 S406 S407 S408 S409 S410 S411 PASSWORD UNIT 01 Actual Level0) Low Pressure Alarm Delay Electric Stages Heater ON at CFC Water Detector Water Detector Function 3P Actuator Runtime 3P Actuator Direction 1min 1 -66 % No sec for next/previous unit then ???? to select parameter to confirm to change parameter Low Pressure Alarm Delay—This parameter sets the amount of time that the u
Liebert iCOM® Control Figure 90 Options setup parameters - Page 2 OPTIONS SETUP (page 2 of 2) S412 S413 S414 S415 S416 S417 S418 S419 S420 S421 S422 PASSWORD WA and AL Relay UNIT 01 Actual Level0) Dehumidification Enabled Auto Restart Enabled Single Unit Auto Restart On-Off Enabled Yes Yes 5sec Yes for next/previous unit then ? ??? Direct to select parameter to confirm to change parameter WA and AL Relay— Dehumidification Enabled—This parameters selects if the compressor and / or valve will be u
Liebert iCOM® Control Table 27 Service contact info parameters Function Large Display Range Imperial (metric) Small Display Page 1 of 1 Password PASSWORD None Austria Switzerland D Switzerland F Benelux D Benelux FL Germany France UK Hungary Italy Poland Spain United States Australia New Zealand Indonesia Malaysia Singapore Country Country Address line 1 Address line 1 text-string Address line 2 Address line 2 text-string Address line 3 Address line 3 text-string Address line 4 Address
Operation in Teamwork Mode 11.0 OPERATION IN TEAMWORK MODE 11.1 Unit-to-Unit Network Wiring Liebert CRV’s can be connected in a unit-to-unit, or U2U, configuration, which allows multiple units to communicate with each other, sharing of local unit status and sensor readings. The U2U network will allow up to 32 units to be connected within a single group and up to 99 different groups to exists on the same physical network.
Operation in Teamwork Mode 11.3 Wiring a Liebert iCOM® U2U Network A network switch is required to enable Ethernet unit-to-unit communication on one or more Liebert CRV’s. Each Liebert CRV requires two straight-through Ethernet cables from a network switch. One cable connects to port P64 on the Liebert iCOM input/output board and the other straight-through cable connects to the P64 port on the back of the large display (see Figure 92).
Operation in Teamwork Mode Wall-Mount Large Display The Liebert CRV has a large display as standard equipment. Only large displays can be used for remotely monitoring and controlling cooling units connected on the same network. Each wall-mount large display requires 120V input power; Liebert provides an AC adapter wall plug. A straightthrough Ethernet cable must be connected between the network switch and the P64 port on the back of the display.
Operation in Teamwork Mode Figure 93 Teamwork modes and sensor management Average / Maximum of Liebert CRV Connected Sensors Average / Maximum of Teamwork Sensors Example: 72°F (22°C) Setpoint Teamwork Sensor Average = 74°F (23°C) Teamwork Sensor Maximum = 76°F (24°C) Sensor (one of 8) Liebert CRV 1 Max = 72°F (22°C) Liebert CRV 1 Equipment Equipment Equipment Equipment Equipment Equipment Equipment Equipment Rack Rack Rack Rack Rack Rack Rack Rack Liebert CRV 2 Liebert CRV 2 Max = 76°F (24°C) 11.4.
Operation in Teamwork Mode Figure 94 shows how two cooling units work together in Teamwork Mode 1. Since Unit 1 and Unit 2 are available to operate, the master unit, Unit 1, averages the temperature and humidity sensor readings from each unit. The master unit determines that a 60% call for cooling is required for the system. Since there are two available cooling units, each unit makes up half of the system proportional band; Unit 1 handles 050% system call for cooling and Unit 2 handles 51-100%.
Operation in Teamwork Mode 11.4.5 Standby—Rotation Typical Standby (Lead/Lag) Function This function can be performed in any teamwork mode, including NO Teamwork. One or more units can be defined to be Standby; the normal status of standby units is Standby Off (fan off). In case one regular unit has an alarm that is defined (to be defined in the alarm configuration), to switch on a standby unit, the faulty unit will switch off and the standby unit will switch on.
Operation 12.0 OPERATION Figure 95 Return air temperature and humidity sensor viewed from the rear of the unit The control system compares the relayed information with the programmed setpoint and proportional band values and performs one of the following operations: • Cooling—Direct expansion mode (DX): The compressor is started and the cold refrigerant flows through the evaporator, thus cooling the air passing through it. For compressor operation see Liebert iCOM® user manual, SL-18835.
Operation • Humidification (optional)—The humidifier creates steam, which is distributed into the air stream via the steam distribution pipe. (See also Appendix A - Humidifier). The Liebert CRV’s humidification is activated when the measured temperature and humidity sensor has been calculated to exceed the corresponding dew point setpoint. The dew point setpoint is calculated based on the temperature and humidity of the sensor set to control the control setpoint and relative humidity.
Operation 12.1 Alarms/Events The following alarms and events are supported by the Liebert iCOM® control on the Liebert CRV. When an alarm is triggered the alarm sounds, the LED will flash red, an event will be written to the Event Log and the BMS will be notified. If the alarm is acknowledged, the alarm will silence and the LED will turn solid red. When the alarm condition is resolved, the LED lights green and the BMS alarm notification is reset.
Calibration and Regulation after Startup 13.0 CALIBRATION AND REGULATION AFTER STARTUP The Liebert CRV has been factory-tested and calibrated, but it is very important to check, at startup, the superheating of the thermostatic valve (A/W versions). • For calibrations of instruments installed on the external condensers/drycoolers, refer to the manual for the equipment. • For control system calibrations, refer to the Liebert iCOM® manual, SL-18835.
Maintenance 14.0 MAINTENANCE 14.1 Safety Instructions All maintenance operations must strictly observe national, state and local accident prevention regulations, especially the regulations concerning electrical systems, refrigerators and manufacturing resources. Air conditioning equipment maintenance may be performed only by authorized properly trained and qualified personnel. To keep all warranties valid, the maintenance must adhere to the manufacturer’s regulations.
Maintenance 14.2 Spare Parts Only original spare parts made by Emerson Network Power may be used. Using third-party material can invalidate the warranty. When making seeking technical assistance, always refer to the component list supplied with the equipment, and specify the model number, serial number and, if available, the part number. NOTE 1. When replacing a faulty component, follow the relevant manufacturer instructions. 2.
Maintenance Table 28 Maintenance schedule Maintenance Period Monthly By User Component Check compressor noise/vibrations Refrigerating Circuit Every 3 Months Every 6 Months Annually X Check oil level through compressor sight glass X Adjust/tighten compressor/functional elements X Check sight glass for problem detection X Check starting/running amps X Check refrigerating circuit main pressures X Check compressor suction superheat X Check discharge temperature X Check subcooling X Che
Maintenance To extract the filters (refer to Figure 97: 1. 2. 3. 4. 5. 6. Push up the upper filter. Pull the bottom of the filter away from the Liebert CRV. Pull it out of the unit. Lift the lower filter up Pull the bottom of the filter away from the Liebert CRV. Pull it out of the unit.
Maintenance 14.5 Condensate Drain and Condensate Pump Systems 14.5.1 Condensate drain Check for and clear obstructions in tubing during routine maintenance. 14.5.2 Condensate Pump, Dual-Float Figure 99 Condensate pump 1. 2. 3. 4. 5. 14.6 Air-Cooled Condenser and Drycoolers 1. 2. 3. 4. 5. 6. 7. 14.7 Disconnect power to the unit using the disconnect switch. Check for and clear obstructions in gravity lines leading to the condensate pump.
Maintenance 14.8 Dismantling the Unit The Liebert CRV has been designed and built to ensure continuous operation. The working life of some of the main components, such as the fan and the compressor, depends on proper maintenance. NOTICE Risk of release of hazardous substances into the environment. Can cause environmental pollution and violation of environmental regulations.
Maintenance • Additional information located in a dedicated label of the unit (Reg. 1494/2007): a.
Troubleshooting 15.
Troubleshooting Table 30 Liebert iCOM® medium control board DIPswitch settings DIPswitch Number Compressorized CRV models CR020 and CR035 Chilled Water Model-CR040 1 On Off 2 Off Off 3 On Off 4 Off Off 5 Off Off 6 Off Off 7 Off On 8 On On 115 Liebert® CRV™
Humidifier APPENDIX A - HUMIDIFIER A.1 PRINCIPAL OF OPERATION When the Liebert iCOM® calls, the cylinder fills to 100% of the Full Load Amperage (FLA) or to the top of the cylinder, whichever comes first. See Figure 100. If it reaches 100% FLA, the water heats and boils away to a level giving 80% FLA. An electronic timer uses the rate of amp fall to determine the water level.
Humidifier A.1.1 Humidifier Water Supply and Plumbing The fill valve is sized for an extended water pressure range of 30 to 80 psi. For installations where water pressure is less than 15 psi, add a pressure boost pump and notify the factory; a fill valve with an oversized opening will be supplied. For installations where water pressure is greater than 80 psi, install a pressure reducing valve in the water feed line to the unit. With dirty or muddy water sources (e.g.
Humidifier A.1.3 Humidifier Startup and Operation • Ambient temperature location for humidifier: 41 - 104°F (5 - 40°C). • Relative humidity location for humidifiers: 5 - 80% RH. Check to see that the unit is securely mounted on a level surface with the proper drain and water supply. Check for correct voltage with appropriately sized service. Check that the steam distributor, steam supply hose and condensate line are correctly installed and routed back to the unit.
Humidifier Remove the Old Cylinder 1. Turn Off the water supply to the unit. 2. The old cylinder must be drained completely before removing. This is done by pushing the auto On/Off/Drain switch to the “drain” position. 3. When the cylinder is empty, push the auto On/Off/Drain switch to the Off position. 4. Open the main disconnect switch during the entire cylinder change operation. 5. The power wires to the cylinder are attached by cylinder plugs to the electrode pins on top of the cylinder.
Humidifier A.1.6 Humidifier Troubleshooting Terms Used • FLA (Full Load Amps) are amps listed on the humidifier specification label. • Short cycling occurs when the humidifier’s “On time” is less than 10 minutes upon a call for humidity. To correct short cycling, all humidifiers have a capacity adjustment that allows the output of the humidifier to be reduced to as low as 20% of rated output, thus extending the “on time” required to maintain output.
Humidifier A.3 STARTING POINT Auto On/Off/Drain switch in On position—unit will not fill: When the On/Off control circuit is made and the Auto On/Off/Drain switch is pushed to On, the 24V holding coil of the primary contactor should energize. The resulting magnetic pull closes the high voltage contacts with a distinct and audible “clunk.
Humidifier Table 31 Humidifier troubleshooting Unit Status Lamp Yellow On Off 1 flash sequence Green Symptom Corrective actions Maximum water level inside cylinder. This usually happens on initial start-up after replacing the cylinder (normal). Water is concentrated with minerals inside the cylinder. Let unit run; yellow light will disappear when the unit is at full output. This may take a day or two. Off No power to the board. Check for main power supply fault.
Electrical Data APPENDIX B - ELECTRICAL DATA Table 32 Liebert CRV electrical data - 60Hz (Amps) Air-Cooled Units CR035RA Voltage 460/3/60 Water/Gylcol-Cooled Units CR020RA 208/3/60 460/3/60 208/3/60 CR035RW 460/3/60 208/3/60 Chilled Water Units CR020RW 460/3/60 CR040RC 208/3/60 460/3/60 208/3/60 Cooling with Dehumidifying, Condensate Pump, Reheat; with or without Humidifier FLA 31.7 62.0 24.3 51.0 31.7 62.0 24.3 51.0 11.7 24.9 WSA 38.6 75.4 29.3 61.6 38.6 75.4 29.3 61.
Electrical Field Connections Descriptions APPENDIX C - ELECTRICAL FIELD CONNECTIONS DESCRIPTIONS C.1 STANDARD ELECTRICAL CONNECTIONS (Source: DPN001884, Rev. 4, Page 1) 1. High Voltage Connection Through the Bottom of the Electric Panel—1-3/8" (34.9mm), 1-3/4" (44.5mm) 2-1/2" (64mm) diameter concentric knockout. 2. Low Voltage Connection Through the Bottom of the Electric Panel—Quantity (2) 7/8" (22mm) diameter knockouts. 3. High Voltage Connection Through the Top of the Unit—1-3/8" (34.9mm), 1-3/4" (44.
Electrical Field Connections Descriptions NOTICE Risk of improper input power. Can cause equipment damage. The electronically commutated motors included in the Liebert CRV unit are suitable for connection to an electrical service providing input power to the unit with 300V or less line-toground potential only.
Refrigeration and Hydraulic Circuits APPENDIX D - REFRIGERATION AND HYDRAULIC CIRCUITS Figure 105 General arrangement—air-cooled units Outdoor Lee-Temp Condenser Outdoor VFD Condenser Head Pressure Control Valve Optional Field-Installed Fusible Plug + Condenser Coil (VFD) + Condenser Coil (Liebert Lee-Temp) VFD Transducer + Sight Glass Lee-Temp Receiver + Hot Gas Discharge Hot Gas Discharge Filter Drier Relief Valve Check Valve Liquid Return Solenoid Expansion Valve Valve Distributor Exter
Refrigeration and Hydraulic Circuits Figure 106 General arrangement—water-glycol units Distributor Vibration Absorber CR020 Digital Solenoid Valve HighPressure Transducer Check Valve B Water/Glycol Return Bottom Connection Expansion Valve Check Valve 3-Way Valve Configuration A External Equalizer High-Pressure Switch Vibration Absorber AB Evaporator Coil Rotalock Valve CR035 Digital Solenoid Valve Low Pressure Digital Transducer Scroll Rotalock Valve Compressor Water/Glycol Return Top Connec
Refrigeration and Hydraulic Circuits Figure 107 General arrangement—chilled water Air Bleed Valve Chilled Water Coil Valve Fitting A B AB Blocker Disk 3-Way Chilled Water Valve Configuration A B AB 2-Way Chilled Water Valve Configuration Plug Pipe Chilled Water Return (Top of Unit Connection) Plug Pipe Chilled Water Return (Bottom of Unit Connection) Plug Pipe Chilled Water Supply (Top of Unit Connection) NOTE: Schematic representation shown. Do not use for specific connection locations.
Refrigeration and Hydraulic Circuits NOTES 129 Liebert® CRV™
Refrigeration and Hydraulic Circuits Liebert® CRV™ 130
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